Efficient Searching with Typescript and Lodash: Boosting Performance with Arrays and Objects

I am faced with the challenge of converting between two classes called MyObject and MyObjectJSON, which have helper methods to assist in the conversion process: myObj.toJSON() and MyObject.fromJSON().

Currently, I have instances of these classes represented in two different constructs that need to be converted back and forth:

  1. A mapping of MyObject instances where the keys are based on their id property: { [id: number]: MyObject }
  2. A list containing instances of MyObjectJSON: MyObjectJSON[]

Seeking guidance on how to efficiently convert between these two structures using the lodash library.

typescriptlodash

Answer №1

const objectMap: { [id: number]: MyObject } = {};
objectMap[obj1.id] = obj1;
objectMap[obj2.id] = obj2;
objectMap[obj3.id] = obj3;
// {
//   1: MyObject,
//   2: MyObject,
//   3: MyObject
// }

let JSONMap: { [id: number]: MyObjectJSON };
JSONMap = lodash.mapValues<MyObject, MyObjectJSON>(objectMap, item => item.toJSON());
// {
//   1: MyObjectJSON,
//   2: MyObjectJSON,
//   3: MyObjectJSON
// }

let JSONList: MyObjectJSON[];
JSONList = lodash.map<MyObject, MyObjectJSON>(objectMap, item => item.toJSON());
// [ MyObjectJSON, MyObjectJSON, MyObjectJSON ]

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